 | Policy: - budget = 1000 - each `provision_gpu(a100)` call = 500 Result: - call 1 -> ALLOW - call 2 -> ALLOW - call 3 -> DENY (`BUDGET_EXCEEDED`) Key point: the 3rd tool call is denied before execution. The tool never runs. Also emits: - authorization artifacts - hash-chained audit events - verification envelope - strict offline verification: `verifyEnvelope() => ok` Feels like this is the missing layer for side-effecting agents: proposal -> authorization -> execution rather than agent -> tool directly. Are you doing execution-time authorization, or mostly relying on approvals / retries / sandboxing. Happy to share the exact output / demo flow if useful. [link] [comments] |
Built a demo where an agent can provision 2 GPUs, then gets hard-blocked on the 3rd call
Reddit r/artificial / 4/9/2026
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Key Points
- The author built a demo of an agent that can provision GPUs via a tool call, with a fixed budget and a per-call cost configured (1000 total budget; 500 per `provision_gpu(a100)` call).
- The first two tool calls are allowed, but the third call is hard-blocked with `DENY` returning `BUDGET_EXCEEDED` before the tool executes.
- The system also produces authorization-related artifacts including hash-chained audit events and a verification envelope, supported by strict offline verification (`verifyEnvelope() => ok`).
- The demo is positioned as an execution-time authorization “missing layer” for side-effecting agents, emphasizing a pipeline of proposal → authorization → execution rather than agent → tool directly.
- The post raises a practical question for practitioners: whether teams enforce authorization at execution time or rely mainly on approvals, retries, or sandboxing.
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